5. Which of the following is a good definition?
A. Line segment is a geometric figure.
B. Square is something not round.
C. Perpendicular lines are lines that intersect at a right angle.
D. A triangle is Isosceles when a triangle has two sides with the same length
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Answers & Comments
C. Perpendicular lines are lines that intersect at a right angle.
Perpendicular lines are lines that intersect at a right angle, it is a good definition.